Patents by Inventor Masakazu Tanahashi

Masakazu Tanahashi has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Patent number: 6876537
    Abstract: A ceramic electronic component includes two or more electrodes 5 and 6 spaced at a predetermined distance from each other, between which a potential difference is produced in operation and a void 9 that penetrates to the outside is provided. In the void 9, a water repellent film 10 is formed. This prevents water vapor from being absorbed in the void 9 connecting the electrodes 5 and 6, and thereby preventing the formation of a conductive path and the occurrence of ion migration.
    Type: Grant
    Filed: August 13, 2003
    Date of Patent: April 5, 2005
    Assignee: Matsushita Electric Industrial Co., Ltd.
    Inventors: Norihisa Takahara, Emiko Igaki, Masakazu Tanahashi, Takafumi Moriyasu, Rui Nakao, Tomoyuki Washizaki, Yoshiaki Fukui
  • Publication number: 20050048367
    Abstract: A non-aqueous electrolyte secondary battery of the present invention includes a positive electrode including a layer of active material particles, a negative electrode including a layer of active material particles and a non-aqueous electrolyte. An organic film including a conductive agent and having a low affinity to the non-aqueous electrolyte is formed on a portion of at least one electrode selected from the positive electrode and the negative electrode. Accordingly, there are provided a non-aqueous electrolyte secondary battery that exhibits a small decrease in capacity during repeated charge/discharge, a method for producing the same and an electrode material for an electrolyte battery.
    Type: Application
    Filed: July 29, 2004
    Publication date: March 3, 2005
    Applicant: MATSUSHITA ELECTRIC INDUSTRIAL CO., LTD.
    Inventors: Emiko Igaki, Masakazu Tanahashi, Miyuki Nakai
  • Publication number: 20040231120
    Abstract: In the present invention, a capacitor element including a valve action metal an oxide film layer formed on the surface of the valve action metal, and a solid electrolytic layer formed on the oxide film layer is provided with an organic compound having a boiling point of not lower than 150° C. and a melting point of not higher than 150° C., and the capacitor element including the organic compound is arranged inside a package. The oxide film is repaired with the organic compound as a solvent by an application of a dc voltage.
    Type: Application
    Filed: July 1, 2004
    Publication date: November 25, 2004
    Applicant: MATSUSHITA ELECTRIC INDUSTRIAL CO., LTD.
    Inventors: Emiko Igaki, Seigo Shiraishi, Masakazu Tanahashi, Sachiko Nobori, Hisataka Katoh
  • Patent number: 6811576
    Abstract: In the present invention, a capacitor element including a valve action metal, an oxide film layer formed on the surface of the valve action metal, and a solid electrolytic layer formed on the oxide film layer is provided with an organic compound having a boiling point of not lower than 150° C. and a melting point of not higher than 150° C., and the capacitor element including the organic compound is arranged inside a package. The oxide film is repaired with the organic compound as a solvent by an application of a dc voltage.
    Type: Grant
    Filed: January 10, 2003
    Date of Patent: November 2, 2004
    Assignee: Matsushita Electric Industrial Co., Ltd.
    Inventors: Emiko Igaki, Seigo Shiraishi, Masakazu Tanahashi, Sachiko Nobori, Hisataka Katoh
  • Patent number: 6808813
    Abstract: A ceramic electronic device is protected at the surface from retention of water, thus having improved operation reliability, and a method of manufacturing the device is provided. A protective layer is formed on the ceramic element and external electrodes by dehydrating condensation of organic silicon compound.
    Type: Grant
    Filed: January 11, 2002
    Date of Patent: October 26, 2004
    Assignee: Matsushita Electric Industrial Co., Ltd.
    Inventors: Takeshi Kimura, Emiko Igaki, Hiroshi Ito, Osamu Yamashita, Masakazu Tanahashi
  • Patent number: 6808845
    Abstract: The present invention relates to an electrode metal material for batteries, capacitors, etc, used in contact with non-aqueous electrolyte, and particularly to a capacitor formed of the electrode metal material, and provides a valve metal material capable of decreasing the internal resistance of the capacitor. The electrode metal material comprises a valve metal material and numerous carbon particles included in the surface of the valve metal material. The carbon particles are further fixed in the surface of the valve metal material so as to expose to the surface. The electrode metal material is coated with an activated carbon layer and used as a double-layer electrode for an electric double-layer capacitor. The carbon particles included in the surface ensure conduction between the activated carbon layer and the valve metal material.
    Type: Grant
    Filed: October 6, 2000
    Date of Patent: October 26, 2004
    Assignee: Matsushita Electric Industrial Co., Ltd.
    Inventors: Seiji Nonaka, Masakazu Tanahashi, Mikinari Shimada, Tamao Kojima, Munehiro Tabata
  • Patent number: 6783211
    Abstract: An ink-jet recording head has nozzles capable of independent ejection and being arranged in high density, in which strength is high, fabricating yield is high, a cost is reduced, ejection efficiency is high, and ejection repeating frequency is high. In this ink-jet recording head, there are two-dimensionally arranged units, in each of which an ink pressure chamber, a partition wall serving as a driving portion, a pressure buffer chamber and a fixed wall are arranged in the same direction.
    Type: Grant
    Filed: December 23, 1999
    Date of Patent: August 31, 2004
    Assignee: Matsushita Electric Industrial Co., Ltd.
    Inventors: Emiko Igaki, Toru Ishida, Masakazu Tanahashi, Hidetomo Nagahara, Kiyohide Amemiya, Masahiko Hashimoto, Masayoshi Miura, Masaichiro Tatekawa
  • Publication number: 20040091781
    Abstract: A lithium secondary battery of the present invention includes: a positive electrode containing a positive active substance capable of reversibly occluding and releasing lithium; a negative electrode containing a negative active substance capable of reversibly occluding and releasing lithium; and an electrolyte having lithium conductivity, wherein the positive active substance contains an oxide including lithium and transition metal, and a composition ratio among the lithium, the transition metal and oxygen in the oxide is in at least one selected from the following states:
    Type: Application
    Filed: November 7, 2003
    Publication date: May 13, 2004
    Applicant: MATSUSHITA ELECTRIC INDUSTRIAL CO., LTD.
    Inventors: Miyuki Nakai, Masashi Shoji, Emiko Igaki, Masakazu Tanahashi
  • Patent number: 6733545
    Abstract: There is provided a solid electrolytic capacitor including an anode body formed of a valve-action metal with a dielectric oxide coating layer formed on its surface, a cathode body, and an electroconductive polymer layer disposed between the anode body and the cathode body. The electroconductive polymer layer contains a softener for softening the electroconductive polymer layer, so that a solid electrolytic capacitor is provided that has small variations in characteristics, a lower equivalent series resistance (ESR), and an excellent high frequency property. In addition, when the anode and cathode of a solid electrolytic capacitor including an electroconductive polymer as a solid electrolyte are joined to each other, a lower ESR can be obtained under a lower pressure, and the electroconductive polymer layer can be prevented from being peeled off.
    Type: Grant
    Filed: June 3, 2002
    Date of Patent: May 11, 2004
    Assignee: Matsushita Electric Industrial Co., Ltd.
    Inventors: Masashi Shoji, Seigo Shiraishi, Emiko Igaki, Masakazu Tanahashi, Mikinari Shimada
  • Patent number: 6721166
    Abstract: A ceramic electronic component includes two or more electrodes 5 and 6 spaced at a predetermined distance from each other, between which a potential difference is produced in operation and a void 9 that penetrates to the outside is provided. In the void 9, a water repellent film 10 is formed. This prevents water vapor from being absorbed in the void 9 connecting the electrodes 5 and 6, and thereby preventing the formation of a conductive path and the occurrence of ion migration.
    Type: Grant
    Filed: July 11, 2002
    Date of Patent: April 13, 2004
    Assignee: Matsushita Electric Industrial Co., Ltd.
    Inventors: Norihisa Takahara, Emiko Igaki, Masakazu Tanahashi, Takafumi Moriyasu, Rui Nakao, Tomoyuki Washizaki, Yoshiaki Fukui
  • Publication number: 20040047104
    Abstract: A ceramic electronic component includes two or more electrodes 5 and 6 spaced at a predetermined distance from each other, between which a potential difference is produced in operation and a void 9 that penetrates to the outside is provided. In the void 9, a water repellent film 10 is formed. This prevents water vapor from being absorbed in the void 9 connecting the electrodes 5 and 6, and thereby preventing the formation of a conductive path and the occurrence of ion migration.
    Type: Application
    Filed: August 13, 2003
    Publication date: March 11, 2004
    Applicant: MATSUSHITA ELECTRIC INDUSTRIAL CO., LTD.
    Inventors: Norihisa Takahara, Emiko Igaki, Masakazu Tanahashi, Takafumi Moriyasu, Rui Nakao, Tomoyuki Washizaki, Yoshiaki Fukui
  • Publication number: 20030234834
    Abstract: A piezoelectric actuator 21 has: a piezoelectric actuator part 22 made up of a common electrode 27, a piezoelectric element 29, and an individual electrode 33; an electrical interconnection joint part 43 formed on the individual electrode 33; an electrical interconnection 45 formed on the electrical interconnection joint part 43; a head block 47 fixed to a nozzle plate 39 through the electrical interconnection 45; and a PI tape 49 disposed within the head block 47. A closed space 57 is defined between the head block 47 and the nozzle plate 39. The closed space 57 is divided by the PI tape 49 into two sections. Of these two sections of the closed space 57, the one on the side of the head block 47 constitutes a first closed space 57a. A moisture absorbent 52 is sealed within the first closed space 57a. Relative humidity within the closed space 57 of the ink jet head 1 is not less than 0% nor more than 20%.
    Type: Application
    Filed: June 16, 2003
    Publication date: December 25, 2003
    Inventors: Takanori Nakano, Masakazu Tanahashi, Kazuo Nishimura, Masaichiro Tatekawa, Shogo Matsubara
  • Patent number: 6661644
    Abstract: A capacitor is provided, in which an anode and a cathode are led out in a same direction, whereby ESL and ESR are lowered at high frequencies. This capacitor includes for example: anodes and cathodes that are laminated alternately with at least a dielectric layer intervening therebetween; at least one anode leading-out portion; at least one cathode leading-out portion; an anode terminal; and a cathode terminal. In this capacitor, the anodes are connected electrically to the at least one anode leading-out portion, and the cathodes are connected electrically to the at least one cathode leading-out portion. The at least one anode leading-out portion and the at least one cathode leading-out portion are led out in a predetermined direction. The at least one anode leading-out portion is connected to the anode terminal and the at least one cathode leading-out portion is connected to the cathode terminal.
    Type: Grant
    Filed: October 4, 2002
    Date of Patent: December 9, 2003
    Assignee: Matsushita Electric Industrial Co., Ltd.
    Inventors: Mikinari Shimada, Emiko Igaki, Tsunenori Yoshida, Masakazu Tanahashi
  • Publication number: 20030219649
    Abstract: A nonaqueous electrolyte secondary battery including a battery case that is not corroded easily even at the time of over-discharging is provided. The nonaqueous electrolyte secondary battery includes a battery case serving as a negative electrode terminal, and a positive electrode, a negative electrode, a separator and a nonaqueous electrolyte that are enclosed in the battery case. The positive electrode and the negative electrode respectively include an active material that stores and releases lithium reversibly. The battery case includes a case formed of a metal plate having iron as a principal component and a metal layer formed at least in a part of an inner surface of the case, and the metal layer includes a metallic element M that dissolves in the nonaqueous electrolyte at a lower potential than iron and at a higher potential than lithium.
    Type: Application
    Filed: May 21, 2003
    Publication date: November 27, 2003
    Applicant: MATSUSHITA ELECTRIC INDUSTRIAL CO., LTD.
    Inventors: Masashi Shoji, Emiko Igaki, Masakazu Tanahashi, Toshikazu Nakamura, Mikinari Shimada
  • Publication number: 20030137799
    Abstract: In the present invention, a capacitor element including a valve action metal, an oxide film layer formed on the surface of the valve action metal, and a solid electrolytic layer formed on the oxide film layer is provided with an organic compound having a boiling point of not lower than 150° C. and a melting point of not higher than 150° C., and the capacitor element including the organic compound is arranged inside a package. The oxide film is repaired with the organic compound as a solvent by an application of a dc voltage.
    Type: Application
    Filed: January 10, 2003
    Publication date: July 24, 2003
    Applicant: MATSUSHITA ELECTRIC INDUSTRIAL CO.
    Inventors: Emiko Igaki, Seigo Shiraishi, Masakazu Tanahashi, Sachiko Nobori, Hisataka Katoh
  • Publication number: 20030134133
    Abstract: A ceramic electronic device is protected at the surface from retention of water, thus having improved operation reliability, and a method of manufacturing the device is provided. A protective layer is formed on the ceramic element and external electrodes by dehydrating condensation of organic silicon compound.
    Type: Application
    Filed: January 11, 2002
    Publication date: July 17, 2003
    Inventors: Takeshi Kimura, Emiko Igaki, Hiroshi Ito, Osamu Yamashita, Masakazu Tanahashi
  • Patent number: 6580601
    Abstract: A solid electrolyte capacitor includes an anode made of a valve metal on whose surface a dielectric oxide film layer is formed, a solid electrolyte layer formed on the dielectric oxide film, a cathode layer formed on the solid electrolyte layer, a cathode contact terminal electrically connected to the cathode layer, and an anode contact terminal electrically connected to the anode layer. The cathode layer includes a carbon layer containing carbon particles, and a conductive paste layer containing conductive metal particles and having numerous pores, formed in that order from the solid electrolyte layer side. The solid electrolyte capacitor further includes a conductive polymer layer formed through the numerous pores of the conductive paste layer and connecting the carbon particles of the carbon layer and the conductive metal particles of the conductive paste layer.
    Type: Grant
    Filed: October 30, 2002
    Date of Patent: June 17, 2003
    Assignee: Matsushita Electric Industrial Co., Ltd.
    Inventors: Takahiro Hamada, Emiko Igaki, Masakazu Tanahashi
  • Patent number: 6576026
    Abstract: The present invention provides an electrolytic capacitor and its anode body using a laminate of plurality of sheets of valve metal foil, exhibiting excellent high-frequency response and lower inner impedance as a electrolytic capacitor. The anode body for a electrolytic capacitor includes; a laminate of plurality of rectangular anode valve metal foil each which has dielectric layers of its metal oxide film anodized on roughened surfaces of each anode valve metal foil; and a fixing frame to clamp the laminate in the laminating direction to fix the laminate and connect electrically with anode layers of the laminated foil. Such an anode body may be used to be filled in the liquid electrolyte in the container to make a capacitor.
    Type: Grant
    Filed: September 1, 2000
    Date of Patent: June 10, 2003
    Assignee: Matsushita Electric Industrial Co., Ltd.
    Inventors: Seigo Shiraishi, Emiko Igaki, Masakazu Tanahashi
  • Publication number: 20030103320
    Abstract: A capacitor is provided, in which an anode and a cathode are led out in a same direction, whereby ESL and ESR are lowered at high frequencies. This capacitor includes for example: anodes and cathodes that are laminated alternately with at least a dielectric layer intervening therebetween; at least one anode leading-out portion; at least one cathode leading-out portion; an anode terminal; and a cathode terminal. In this capacitor, the anodes are connected electrically to the at least one anode leading-out portion, and the cathodes are connected electrically to the at least one cathode leading-out portion. The at least one anode leading-out portion and the at least one cathode leading-out portion are led out in a predetermined direction. The at least one anode leading-out portion is connected to the anode terminal and the at least one cathode leading-out portion is connected to the cathode terminal.
    Type: Application
    Filed: October 4, 2002
    Publication date: June 5, 2003
    Applicant: Matsushita Electric Industrial Co., Ltd.
    Inventors: Mikinari Shimada, Emiko Igaki, Tsunenori Yoshida, Masakazu Tanahashi
  • Patent number: 6558616
    Abstract: An electrode for a PTC thermistor of the present invention includes a base layer having electrical conductivity and a sintered layer formed on the base layer. The sintered layer is formed by sintering a conductive powder and has electrical conductivity, and has roughness on a surface thereof. Thus, the present invention can provide an electrode for a PTC thermistor that has a large adhesion to the conductive polymer and can be produced easily.
    Type: Grant
    Filed: February 5, 2001
    Date of Patent: May 6, 2003
    Assignee: Matsushita Electric Industrial Co., Ltd.
    Inventors: Masahiro Ito, Masakazu Tanahashi, Toshiro Kume, Kouichi Morimoto, Junji Kojima, Emiko Igaki